SDR DXTA2011041104544

Service difficulty report · Control Unit · Cessna 680CE

Difficulty date: April 11, 2011
Submitted: April 13, 2011
Operation: Air carrier
Aircraft: N339QS
Make and model: Cessna 680CE
Aircraft serial: 6800191
Aircraft time: 2,704 hours, 1,716 cycles
Engine: Pwc PW306C
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Control Unit
Condition: Dirty
Location: Mlg
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFTER TAKEOFF, LANDING GEAR HANDLE COULD NOT BE MOVED FROM THE DOWN POSITION. THIS WAS FOLLOWED BY AN AMBER "WOW MISCOMPARE" CAS MESSAGE. PERFORMED GEAR SWING. NO DEFECTS NOTED. COULD NOT DUPLICATE SQ REMOVED & INSPECTED GEAR HANDLE CONTROL UNIT. FOUND UNIT DIRTY & CLEANED. REINSTALLED UNIT. CHECKED SERVICE OF NOSE STRUT & RESERVICED. OPS & LEAK CK GOOD. INSPECTED ALL 3 SQUAT SWITCHES. NO DEFECTS NOTED. PERFORMED FINAL GEAR SWINGS. OPS CHECKED GOOD. ALL IAW MM 32-20-00.